code: def _is_negative_inf(x):
      return x <= tf.constant(float("-inf"), dtype=x.dtype)
  
file_path: probability/tensorflow_probability/python/optimizer/bfgs_utils.py
imports: import collections
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import dtype_util
  from tensorflow_probability.python.internal import prefer_static
  from tensorflow_probability.python.optimizer.linesearch.hager_zhang import hager_zhang
label_desc: Use image node_id 5 for calling a global function with example usage: _is_negative_inf(x) and returns: unknown